Use a sharp knife to cut ripe watermelon into roughly 2-inch chunks, removing the rinds. Transfer the chunks into a blender.
Add the ice cubes and honey (if using) to the blender with the watermelon.
Blend on high speed until the mixture is smooth, approximately 30-45 seconds. Look for a vibrant pink color and a uniform, pulpy texture.
Set a fine mesh strainer over a large bowl or pitcher. Pour the blended mixture through the strainer, using a spatula or spoon to press and pass the liquid, separating seeds and pulp for a smooth juice.
Pour the strained juice into a glass, allowing the cool, pink liquid to settle. Optionally, garnish with a small mint sprig or watermelon wedge for presentation.
